18638221

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{3259}}^1$

素因数の和:3328

約数の個数: 16

約数和(自身を含む): 22950400

約数和(自身を除く): 4312179

約数列:

[1, 7, 19, 43, 133, 301, 817, 3259, 5719, 22813, 61921, 140137, 433447, 980959, 2662603, 18638221]

約数ペア:

[(1, 18638221), (7, 2662603), (19, 980959), (43, 433447), (133, 140137), (301, 61921), (817, 22813), (3259, 5719)]